is 2 1794697 - 1
has 540258 decimal digits
takes 0.097 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L8AF92D94155B8A8Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.556568.6567%500000150000000.10155.0567%16.658070.2416%1.5849%
PrimeNet2570.010763.1579%80001400000.00122.8159%0.011964.1953%1.0374%
GPU722610.171265.5738%80001300000.00121.4942%0.172366.0882%0.5144%
Difference+6+16.3853+3.0829%+492000+14870000+0.1003+3.5625%+16.4857+4.1535%+4.1535%

Known prime factors (2 factors, 128.5 bits, 0.00716064% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
179469730278948122303642311961.393843567134795
5 × 7 × 11 × 3571 × 613577
2009-07-1135716135770.32810.00290.0049
17946971602294574243519028872167.11944639696122619
13 × 3433822778663
2020-06-2913343382277866316.76914,71727,486

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
179469748515794290168114495698318902595043489739128.512
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:35:03alpertronManual testing5000001500000012-
skipped known factor: 3027894812230364231
--0.101--5.057%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.021--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.712 GHz-days
Estimated T-Level:24.589
DigitsB1CurvesCompleteFacMiss
2011000257 / 1002.5707.555%
2550000257 / 2800.91839.872%

New Calculation Method

Total ECM effort:17.712 GHz-days
Estimated T-Level:24.589
DigitsB1CompleteFacMiss
20110008.2900.025%
25500000.74947.271%
302500000.04695.491%
3510000000.00299.789%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000025417.51
50000500000030.207


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13T00:00:00ANONYMOUSv4_computers8AF92D94155B8A8F0.097


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T17:15:01Oliver KruseGTX-0
3027894812230364231
2D6338D3CD5CD5__no
2017-11-05T11:20:15Chang Chia-Tcheexbpc13
3027894812230364231
2D6338D3CD5CD5__no
2020-06-29T16:24:49ATHec2-PRPCF
3027894812230364231
160229457424351902887
60C091F585DEBA27no
2020-06-29T21:04:03MarkSdesktop-i7
3027894812230364231
160229457424351902887
60C091F585DEBA27no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2020-11-27T10:34:04+00:00